/*
 * Copyright 2012-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package samples.websocket.tomcat.snake;

import java.awt.Color;
import java.util.Random;

public final class SnakeUtils
{
    
    /**
     * The width of the playfield.
     */
    public static final int PLAYFIELD_WIDTH = 640;
    
    /**
     * The height of the playfield.
     */
    public static final int PLAYFIELD_HEIGHT = 480;
    
    /**
     * The grid size.
     */
    public static final int GRID_SIZE = 10;
    
    private static final Random random = new Random();
    
    private SnakeUtils()
    {
    }
    
    public static String getRandomHexColor()
    {
        float hue = random.nextFloat();
        // sat between 0.1 and 0.3
        float saturation = (random.nextInt(2000) + 1000) / 10000f;
        float luminance = 0.9f;
        Color color = Color.getHSBColor(hue, saturation, luminance);
        return '#' + Integer.toHexString((color.getRGB() & 0xffffff) | 0x1000000).substring(1);
    }
    
    public static Location getRandomLocation()
    {
        int x = roundByGridSize(random.nextInt(PLAYFIELD_WIDTH));
        int y = roundByGridSize(random.nextInt(PLAYFIELD_HEIGHT));
        return new Location(x, y);
    }
    
    private static int roundByGridSize(int value)
    {
        value = value + (GRID_SIZE / 2);
        value = value / GRID_SIZE;
        value = value * GRID_SIZE;
        return value;
    }
    
}
